Sonic the Hedgehog Mini Backpack for Kids - Bundle with 12” Sonic Backpack Plus Stickers, Water Bottle, More | Sonic Backpack Small for Boys. This Sonic the Hedgehog preschool backpack features adjustable shoulder straps, a zip closure compartment, and a top loop for hanging featuring colorful artwork of Sonic, Tails, Knuckles, and Shadow. The Sonic backpack measures approximately 12" x 9" x 4". This Sonic backpack for kids has plenty of space for your little one to take small items to preschool. The front accessory pocket is perfect for holding Sonic the Hedgehog pencils, pens, school supplies, toys, snacks, and more. This durable Sonic backpack for boys and girls also comes with bonus sports stickers, a Beach Kids water bottle, and a Rex-Man door hanger! Officially licensed Sonic the Hedgehog mini backpack set for kids. Pair this with other Sonic the Hedgehog school supplies.